Compare tap water hardness in 3 cities in East Midlands, England. Average: 21.05°fH (Good quality).
In East Midlands, tap water hardness averages 21.05°fH, corresponding to hard water. The softest water is found in Derby (19.81°fH, score 7/10) and the hardest in Nottingham (22.66°fH, score 6/10). The England average in our dataset is 18.1°fH. All 3 cities have water compliant with DWI regulations (Water Supply (Water Quality) Regulations 2018).
The average tap water hardness in East Midlands is 21.05°fH, corresponding to hard water. Among the 3 cities covered, the softest water is found in Derby (19.81°fH) and the hardest in Nottingham (22.66°fH). The England average in our dataset is 18.1°fH.
Yes. Tap water in East Midlands is regulated by the Drinking Water Inspectorate (DWI) under the Water Supply (Water Quality) Regulations 2018. Water hardness of 21.05°fH does not affect safety; it only influences appliance maintenance and taste. All 3 cities in our database have compliant water.
At 21.05°fH average, a water softener is optional in East Midlands. Basic anti-scale measures (pitcher filter, regular descaling) are sufficient in most cities.
Water in East Midlands is supplied by Severn Trent Water. Data in our database comes from official zone-level analyses published by these utilities (2025).
All 3 cities in East Midlands with their hardness values are listed on this page. Click on any city name to get full details: quality index, DWI compliance, impact on appliances and personalised recommendations.
Data: Severn Trent Water official zone-level hardness reports (2025). Readings verified via DWI drinking water quality database.